Oelandia
Appearance
Oelandia Temporal range:
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | †Helcionelloida |
Order: | †Helcionelliformes |
Superfamily: | †Helcionelloidea |
Genus: | †Oelandia Westergård, 1936 |
Oelandia is an extinct genus of basal molluscs of the family helcionellid from the Middle Cambrian of Sweden, China and North America.[1] It has a small, upwards-pointing anterior snorkel with a closed end. It bears pronounced concentric ribbing around its strongly coiled exogastric shell.[1]
References
- ^ a b Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.; Conway Morris, S (eds.). The Early Evolution of Metazoa and the Significance of Problematic Taxa. Cambridge University Press. pp. 157–177. ISBN 978-0-521-40242-2.